You may not make negative references to other forum members in your signature. You are permitted to quote them and provide a link to the original post, but leave out their name. This means that you can not use the built in quoting tool, because it states the member's name.

I will give members with sigs in contravention of this notice of change 48 hours and if sigs are not changed voluntarily they will be removed when I see them or they are reported.

Just a question for freediver. Is that invasion of the security of a Members personal profile okay with you, freediver?

There is nothing there that is personal. It contains your settings. Your sig is not personal, it's in every post, your nick is not personal, it's in every post too. We can not read PMs or anything like that, it's just settings. I can see more "personal" stuff like email and IP address by just clicking on your name like I do to send you PMs.